Telephone system.



H. P. CLAUSEN.

TELEPHONE SYSTEM, APPLICATION FILED JULY 26.1917.

Patented Feb. 25, 1919.

2 SHEETS-SHEET I- H. P. CLAUSEN.

' TELEPHONE SYSTEM.-

APPLICATlON FILED JULY 26,191,.

1,295A35B Patented. Feb.25,1919.

2 SHEETS-SHEET 2.

, masses 2% is energized over a circuit extending from grounded battery, side-switch Wiper 298 in its first position, inner contactand armature of relay 202, back contact and armature of relay 200 to ground. I

At the close of the tens series of im-. pulses, the relay, 200 ah'cracis its armature ior a re etively long interval tobring about the (lelnergization of she relay 203. 'lhe onergiziu'gg circuit of the escape magnet 204 is thus lDfikEblTllpifid and this magnet moves it side-switch Wipers into their second pol llhe calling'swbscriber now operates "lth sendiu-g; device 201 to transmit impulses .corsesponding to the units digit of "the desireduumher. in response to these impulses, (the line relay 200 vibrates its armature, and,

at the first retraction of its armature, again closes an energizing circuit for relay .The energizing circuit of the escape mslguet is iherchy' again established. As the line relay 2&0; retracts its armature in response he each impulse, the secondary magnet is energized over a. circuit from grounded batiery, winding of this magnet, side-switch wiper 208 (second position), inner front cousac't' aud armature to relay 202, back Contact and armature of relay 200, to ground. The secondary motor magnet advances she brushes 209, 210 and 2 11 over she terminals oil iheselecied group. Atthe close of she 'ts series of impulses, the-relay 203 rearmature to interrupt the energize; circuit of sheet-scape magnet 29%. The

sic

e cape 204:, on deenergizing, moves 1 side-switch wipers into their third posirelay 216 is than energized from grounded battery, Winding of this relay, right-hand armature and contaclz of relay 229, sidee'wi'cli Wipers 23 i and 233, lef'llaud aiioiaifiuce and contact of relay 229 to arousal] I In position of the side-swifcch wipers the relay 2-03 is energized over a circuit now traced from grounded hattery, Winding of? 'i-his relay, sid-eewitch Wiper 208 (third position), conductor 212, front contact and a2 mature of relay 200, which is now energized, to ground. Relay .2433, by atsraciing its t-h-aud armature, reeslahlishes' the energia 11g circuitto the escape magnet 20%. The escape magnet soeate-races its armalure and i'herehy completes a. circuit for signaling the called suhsbaliou This circuit is traceable from grounded he tcery. through the genera- ?cor 213, wind of the marginal riugi irip relay 205, coolest and armature oi ii .gnet 204, c-ouduolor 214, side-switch u i 215 (ecu-a position}, lower ariua'liurc contact of relay 216, connecting hrush 'Zhrough the terminal and ring cone We lice, ilu'ougli suhst "on eiuz'- p conductor audlzerminal of Bs line. or crush 26%, coutacs and ugi'per ofigelay v36, SVilWllrWlQfil 21? scribcr at substation 'izec .wi 'rer 22h- {ic-urth position), to ground. it

( thir-d posieion), conductors 21,8 and 212,

from contact and armature of rela 200 to u v ground. When the subscriber B removes his over a circuit traced from grounded battery,

right-hand Winding of relay 220, side-switch Wiper 215, lower armature and contact of relay 216, brush 210, the connector terminal and lower side of the called suloscrihcrs line, through 'the substation B, upper side of the line, terminal connector brush 209, contact and upper armature of relay 216, side-switch Wiper21i' (fourth position) left-hand Winding of relay 220, to ground. It .Will be noted that the talking current of the called suicscriher is supplied through the windings of rela 2-26.. if, now, the subscriber; at substation E desires to converse with the sub C, it is necessary that! his cuoofi' relay 221 he deenergized in order to reconnect the line relay 222 to his line. This is accomplished by the subscriber at substation E operating his sending device 223 totransmit a predetermined number of impulses. When the relay 220 denergizes in resfioiise to the first impulse :irom the sending device, the slow releasing relay 226 becomes energized over a circuit extending from grounded battery, winding of this relay, outer leftdmnd back contact and armature of relay 227, inner right-hand back contact and armature of relay 220, sideswitch Wiper 225 (fourth position), to

ground. The relay 226 attracts its arms-- tures and when the relay'220 attracts its armature at the close of the from the sending device, a circuit is completed through grounded batterv inner .17 right-hand contact and armature of relay 2%, .Winding of the slow releasing relay 227,

inner front contact and arr ature of relay 220, side-switch Wiper 225, to ground. Helay 227 is energized in this circuit and attracts its armatures. W hen the relay 220 deeucrgizes in response 530 the next impulse from the sending device 223, slow releasing relay 228 is energized over a circuit C0111- pleced from grounded h, aery, winding of this rel y, outer lefi-hand front contact and armature of relay 227, left-hand back conand armacure of rela 1 sec, side-swilch will now seen that she slow releasing r lays226, and 228 have been energized. As a N uh, of operation of these relays an energizi circuii is oleted for the re- Tihis circui first impulse I lay be traced from lay. This prevents the cut-oti' relay from remaining energized in parallel with relay 229 over conductor 232. The cut-ofl' relay 221 has its energizing circuit interrupted at the left-hand armature and contact of relay '229 and retracts its armatures to connect the line relay 222 to Bs line. The line relay 222 in operating causes the line switch, which is diagrammatically indicated at 230, to connect Bs line to an idle selecting switch diagrammatically indicated at 231. The line switch 230 in operating causes the operation of the cut-oft relay 221 due to ground on lead 240. The relay 229 is also energized in parallel with the cut-off relay over a circuit traceable from the grounded battery, winding of the relay 229, right-hand front contact and armature of this relay, test brush 211 of the connector to ground through the contact springs of the line switch 230. It will be seen that the relay 229 at its right-hand back contact and a rniature interrupts the energizing circuit of the relay 216. The relay 216 on deiinergizing opens the contacts of the conversational circuit which connects the subscribers at stations A and B.

When the subscriber at station B desires to disestablish his connection with the subscriber at station C, he momentarily replaces his receiver on its switchhook. This opera tion causes the line switch to restore and the other switches employed in establishing the connection to G substation to be restored in the Well known manner. The release of the line switch 230 causes the momentary .deenergization of the cut-off relay 221, and also causes the dee-nergization of the relay 229. The subscriber at st ation B then immediately removes his receiver from its switchhook. The cut-oil relay 221 is now energized over a circuit extending from grounded battery, winding of the cut-ofl relay, test terminal and test brush 211, side switch wiper 233 in its :fiourth position, left-hand armature,- and contact of relay 229 and to ground through one of a pluraliity of paths completed through the right-hand armatures and back contacts 'of'relays220, 227, 226 and 228. The relay 216 is also energized in parallel with the cut-off relay over a circuit traceable ,from grounded battery, winding of the relay 216, right-hand armature and back contact of relay 229, side switch wiper 23): in its fourth position, side switch wiper 233 in its fourth position over the remainder of the circuit previously descrbed to ground. The relay 216 in attracting its armatures again completes the conversational circuit between the substations A and B.

At the close of the conversation the restoration of the connector switch, which is under the control of the calling subscriber, is brought about by the subscriber at substation A replacing his receiver on its switehhook. In response to this operation the relay 200 retracts its armature. This interrupts the energizing circuit of the slow releasing relay 202, causing it, after a brief interval. to retract its armatures. An energizing circuit is' thereupon completed for the release magnet of the connector. This circuit extends from grounded battery, righthand winding of the relay off-normal contact 236, inner left-hand back contact and armature of relay 202, back contact and armatureof relay 200 to ground.

it the desired line leading to the substation at 1% was found to be busy,the relay 2. 5 is energized to bring about the restoration of a connector switch and to apply a busy tone' The energizing circuit of the release magnet 235 is then completed from grounded battery. right-hand winding of-the. release magnet- 235, ()lT-llOl'lllill contact 236, left-hand armature and contact of relay 203, side-switch wiper 234 in itssecond position, to ground over a multiple test contact. Magnet 235 on attacting its armatures cornpletes a locking circuit for itself from grounded battery through its left-hand winding and its left-hand contact and armature, conductor 212, front contact and armature of relay 200 to ground, As a result of a completion of this last traced circuit, the release magnet 235 releases the connector switch ind through its right-hand armature and contact applies a busy tone to the calling line; this tone is applied until the calling subscriber replaces the receiver on its switchhook. lay 200 retracts its armature to break the locking circuit of the release magnet 235.

What is claimed is: v

:1. In a telephone system, a pluralityof stations, means for establishing a conneo'ti'on from One of said stations to a second station, means for interconnecting the second station with a third station and for discontinuing "the talking connection from the first named station while said second and third stations are interconnected, means to disconnect said third station, and means controlled by said disconnection for reestablishing the connection between the first and second stations.

2. In a telephone system, a plurality of stations, means for establishing a connec- As a. result the line re-.

, stations, an impulse soniiing i so first named sotion Wi third stations are inter comisoiooi, releasing eiihsr of the estsbiisiiozi (Johnsotionss ans oontroiied o tho one of i 3. connections for likabing {the connection between tho first and sooond. stations.

in s teiep some sysiom o piumiity of device at each station, means for ostsbiis. g a eoiiiieofirm from one ssiol so second station, means controiisd by the sending {is vice at the seconri stat-ion for interconiiec'bing the some with a thini station and for oisooninming the tsiking' oonnoooion fYOm the first named: siastion Whiie Saki seoonci and thirvi stations are interoonneotesi, means in discomieot soiai shim station, and means controiied. *by said disconnection "for rosiabiishing the ooiineetion between the first. and second stations,

i. in s teiepiione system, a si-eo'zioiis for au'tomairieoii ing connection from one of s 15 stations to a second station means i 01 into? onus-osing the, second sfistion with a tiii'rci s-csiion and for (i' on tinuiog the talkingconnection from meiirst nameci station Wiiiie soici sooonci anci third; stations are inter-sow neo booi, means is disconnect ssici this! sis ion, and means oonti'oiioci by ssiai disoom nection for automaticaiiy i'o'o'stobiishing tho talking coniiecfibion between -she first omi seo ond staitions.

5. In a ivoiepi'ioiie s piuraii'ty oi s za-iions, an impuise sonciiiig" oiievico oocn station, moons for esfaebiisiiing o connec- "bion from one of ssdi sts sions to s seoonei piurali i of rievioe oi", itiie seoomi infiei'oon posting" viii some with a. shim? station sand sstion means oontroiieii by the, sending for discontinuing the toikinp; connectionfrom the first named: station Whiis soici second;-

tmroi sia'tions are interconsoetai moans for releasing either of the estoioiisheci ooimeo'bions, sni moons coin e'of one oismo; ooii motions. for resiobiishing the commotion befiwoen ails first anti seoomi stations.

6. in s iSeiGPilQBe sys'em, s pi'ailliitry" of stations, on impuise 'somiing (ievioe ois'oseii station, SWii/CifiBS for estobiisiiing cosmos ,tion from one oi saioi stations to a sooonoi station, oiooaromagnotio moons for operasaim; W'Eiiie ska ssoonzi omi iJi'iiEii s ssifl switches, otheo swiiciies QOHiZiKPiiEd 'h y tiio sensing ciovioe at iiilfi sooomi fox in tei'oonssofiisg she some with o iliiiifii ssstion, moons somooi )Uz'": ogieissizioii oi? ssiai switches liaising: commotion from the intoroomiscto, means to third and moms ooozoiieo s dis-eons foi' he also i ooiiiieoi on boss son the iii-st and. soooiioi mimooi sisifiions. 'E. ""31 stzmioos ilioreisi oiio' said circuit; the oon- Mono Si EiiEiOFQS while, {he seooso fiiiiir'i stsfsioiis e 1' Y neote and for pica; piotiiig "siio commotion initis'lzeii 503.21 the sec onci staiion.

8, i telephone system, ii piursiity of stations, pulse transmitting down-es ass0- stations are connected, and moans for compieting the connection initiated fyom szi-ici soconci SilfiiiiOil.

9. in a teiophone system on incoming line, a plurality of oofsgoing iioss 01 in toi'conneoting said incoming iino with an outgoing iii e, mechanism soi'maliy maintaining said outgoing line inoperative as an incoming lino WiliiB is is connected to soioi incoming line, zoo-kins contra-Bod over said outgoing line for rendering said mechanism insiffootive, mes-11s for commuting said out going line to a second wa -0m line and means for ro-iezising the osmbiisnsci counse iliOllS.

10. In a telephone systom, an incoming lino sod, giulaliay of outgoing lines, an impsise transmitting device associsied'with each of said outgoing lines, means for interconnecting ssid incoming lino with of said outgoingiioes, me-choir sin normally maintaining Elie seiooitoci out-going line inoperstive as an incoming iine While it is cox nectezi to said incoming, iiioo, mes-11s" con: troiied by ssioi iinpuise transmitting devicefor remiss-mg ssici mechanism inefioctive, means commuting said outgoing line to a, second ousg oing iine soo, means Ioi' ssisssing the established oomieotionsi.

ii. in telpiione system an inoomizi line a iuraiiia' of'out oin iines 21 onto" v a a reioy and lino relay individual so oaoii' of said outgoing" lines, said ou'toii i'eisy opsrst-' mg so remove control of said iine relay f 'ozgs its associated; iine,' means 350? intei'oon necking said incoming iine with sny of said oiiogoisg iines, moons operzotivs thereupon so operate said cut-off relay, mechanism controlled from the selected outgoing line while the original connection is maintained to cause the selected line to regain control of its line relay, and means to interconnect said selected outgoing line with a second outgoing line.

12.111 a telephone system, an incoming line, a plurality of outgoing lines, an impulse transmitting device associated with each of said outgoing lines, a cut-oft relay and a line relay individual to each of said outgoing lines, said cut-ofi' relay operating to remove the control of said line relay from;

its associated line, means for interca'nnecting said incoming line with any of said outg'o'ng lines, means operative thereupon to operate said cut-01f relay, mechanism controlledtroin the impulse transmitting device associated with the selected line while the original con nection is maintained to cause the selected line to regain control of its line relay; and means to interconnect said selected outgoing line with a second outgoing line.

13. In a telephone system, an incoming line, a. plurality of outgoing lines, a cut-oil relay and a line relay controlled thereby assoclated with each of said outgoing lines, means for interconnect ng said incoming line with an of said outgoing lines, means opermamas ative thereupon to effect the operation of said cut-off relay and the denergization of said line relay, mechanism controlled from the selected outgoing line while the connection is maintained for reversing the condition of said line and cut-ofl relays associated therewith to initiate a second connection, and means'to complete the initiated connection.

14.. In a telephone system, an incoming line, a plurality of outgoing lines, an impulse transmitting device associated with each of said outgoing'lines, a cut-off relay and a line relay controlled thereby associated with each of said outgoing lines, means for interconnecting said incoming line with any 7 ofsa d -outgo1ng lines, means operative thereupon toefi'ect the operation of said cut ofire'lay and-the de'cnergizati-on of said line relay, mechanism controlled from the impulse transmitting device associated'avith the selected out-going line, said mechanism opelw ating While the connection is maintained for reversing the condition of said line relay and said cut-off relay to initiate a second connecti on, and means to complete the initiated connection.

In wit-nesswhereof, I hereunto subscribe my name this 24th day of July, A. D. 1917.

HENRY P. CLAUSEN. 

